Dye.



GEOBG HQLSTSE, F VOE'WINKEL, NEAR ELBERFELD, GERMANY, ASSIGNOR '10Fllifir BENFABBIKEN FORM. FRIEBE. BAYEE, & (20., 0F ELBEREF-LD, GERMANY,A C93 IPGRATIOH 0F GERMANY.

No Drawing.

with (liaminodiphenylureadisulfonic acid and reducing the products thusobtained,

The new products are distinguished by the remarkable property, that theyhave the same afinity for the fiber'as the so-called substantive dyesand that "they can be fixed on the fiber in the same way es thesecolors.

3 claim The herein described new products being chemically aminobenzoylcompounds of diaminodiphen 'luree disulfonic acid, which are after beingdried and pulverized in the shape of their alkaline salts grayishpowders soluble in water; possessing affinity for the fiber; and whichcan be diazotized on 5 the fiber and combined with use dyestulf PatentedDec. 2%, 1%13.

Application filed January 24, 1911. Serial No. 804,436.

Cotton thus prepared can be diazotized on the fiber and combined withsuitable axody'estuii' components.

Bele-nephthol furnishes e. fest red, 1- phenyl-3-methyl-fi-pyrazolone agreenish yellow fast to light, washing and cross-dyemg.

The new products ere after being dried and pulverized in the shape oftheir alkaline salts grayish powders luble in water, being split up byhot ca-uszib soda lye into diaminodiphenylurea disulfonic acid andaminobenzoic acid.

In order to illustrate the new process more fully the following exampleis given, the parts being by weight :-75 parts of diaminodiphenylureedisulfonic acid (sodium salt) are stirred up with 800 parts of hot Waterand parts of sodium carbonate. Subsequently parts of moltenpare-nitrobenzoylchlorid are slowly added during stirring. Vi hen thereaction is complete 5260 parts of iron filings and 10G parts of aceticacid are added to the mass of the reaction which is rendered alkalinewith soda and filtered. From the filtrate the sodium salt of the newcompound is precipitated by the addition of common salt.

witnesses.

GEURG HOLSTE. [r1 s} Witnesses:

CHAs. J. Wnrencr. Amman HENKEL.

